An unidentified flying object, or UFO, in its most general definition, is any apparent anomaly in the sky that is not identifiable as a known object or phenomenon. Culturally, UFOs are associated with claims of visitation by extraterrestrial life or government-related conspiracy theories, and have become popular subjects in fiction. While UFOs are often later identified, sometimes identification may not be possible owing to the usually low quality of evidence related to UFO sightings (generally anecdotal evidence and eyewitness accounts).

Stories of fantastical celestial apparitions have been told since antiquity, but the term "UFO" (or "UFOB") was officially created in 1953 by the United States Air Force (USAF) to serve as a catch-all for all such reports. In its initial definition, the USAF stated that a "UFOB" was "any airborne object which by performance, aerodynamic characteristics, or unusual features, does not conform to any presently known aircraft or missile type, or which cannot be positively identified as a familiar object." Accordingly, the term was initially restricted to that fraction of cases which remained unidentified after investigation, as the USAF was interested in potential national security reasons and/or "technical aspects"TAGS : Bible Prophecy , Nephilim , Canary Cry Radio , Illuminati ,Religion, New World Order , Truth , Jesus Christ , The Bible, Spiritual Warfare , Gonz Shimura ,Demons, Angels , Transhumanism , Mark of the Beast, Image of the Beast , Book of Revelation , Christianity , Church ,mysteries, Overcome , Spiritual , Spirits , Conspiracy Theory, X-Files , Tila Tequila ,Flat Earth , B.o.B. , Neil Degrass Tyson, 2016 Elections , World Government , Technology , Science ,Zika Virus, Extreme Weather , Gene Editing, abduction,footage,universe,conspiracy,bigfoot,military,mystery,paranormal,whistleblower,secret,caught,coverup,new world order,ghosts,alien,real,moon,NASA,leak,aliens,ufo,shape,planet,sighting,craft,ufos,evil,best,report,ovni,space,aliens caught on tape,police state,crazy,secureteam10,HD,area 51,apollo,TR3B,triangle,dome,ghost,satan,Scary,confirmed,ISS,shuttle,bible,event,plane,hologram,underground,base,earth,2016,weird,europa,sun,object,phobos,mars,ceres,space station